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From bourne71 <gary...@live.com>
Subject Re: Boosting Search Results
Date Tue, 04 Aug 2009 01:36:03 GMT

Sorry...I mean the double searching part. That is the part I dont understand
how to do...since after retrieving the 1st results, I am not sure how to
search it again.


Ian Lea wrote:
> 
> Sorry, I'm not clear what you don't know how to do.
> 
> 
> To spell out the double search suggestion a bit more:
> 
> QueryParser qp = new QueryParser(...)
> 
> Query q1 = qp.parse("+word1 +word2");
> TopDocs td1 = searcher.search(q1, ...)
> 
> Query q2 = qp.parse("word1 word2");
> TopDocs td2 = searcher.search(q2);
> 
> ScoreDoc[] sd1 = td1.scoreDocs;
> ScoreDoc[] sd2 = td2.scoreDocs;
> 
> // Grab all docids from first search
> List<Integer> docidl = new ArrayList<Integer>();
> for (int i1 = 0; i1 < sd1.length; i1++) {
>   docidl.add(sd1[i1].doc);
> }
> 
> // Add any docids from second search that are not already on the list
> for (int i2 = 0; i2 < sd2.length; i2++) {
>   int docid = sd2[i2].doc);
>   if (!docidl.contains(docid)) {
>     docidl.add(docid);
>   }
> }
> 
> (code just a suggestion, off the top of my head, may not work, may be
> full of bugs, there will be other maybe better ways to do it).
> 
> If that doesn't help, perhaps you could rephrase the question.
> 
> 
> --
> Ian.
> 
> 
> On Mon, Aug 3, 2009 at 10:51 AM, bourne71<garylkc@live.com> wrote:
>>
>> Hey, thanks for the suggestion.
>> I think of performing 2 searches as well. Unfortunately I dont know how
>> to
>> perform a search on the first results return. Could u guide me a little?
>> I
>> tried to look around for the information but found none
>>
>> Thanks
>>
>> Ian Lea wrote:
>>>
>>> You could write your own Similarity, extending DefaultSimilarity and
>>> overriding whichever methods will help you achieve your aims.
>>>
>>> Or how about running 2 searches, the first with both words required
>>> (+word1 +word2) and then a second search where they aren't both
>>> required (word1 word2).  Then merge/dedup the two lists of hits,
>>> keeping the ones from the first search at the top.
>>>
>>>
>>> --
>>> Ian.
>>>
>>> On Mon, Aug 3, 2009 at 4:14 AM, bourne71<garylkc@live.com> wrote:
>>>>
>>>> Thanks for all the reply. It help me to understand problem better, but
>>>> is
>>>> it
>>>> possible to create a query that will give additional boost to the
>>>> results
>>>> if
>>>> and only if both of the word is found inside the results. This will
>>>> definitely make sure that the results will be in the higher up of the
>>>> list.
>>>>
>>>> Can this type of query be created?
>>>> --
>>>> View this message in context:
>>>> http://www.nabble.com/Boosting-Search-Results-tp24753954p24784708.html
>>>> Sent from the Lucene - Java Users mailing list archive at Nabble.com.
>>>>
>>>>
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>>>>
>>>>
>>>
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>>>
>>>
>>>
>>
>> --
>> View this message in context:
>> http://www.nabble.com/Boosting-Search-Results-tp24753954p24788000.html
>> Sent from the Lucene - Java Users mailing list archive at Nabble.com.
>>
>>
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>>
>>
> 
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> 
> 
> 

-- 
View this message in context: http://www.nabble.com/Boosting-Search-Results-tp24753954p24800970.html
Sent from the Lucene - Java Users mailing list archive at Nabble.com.


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